I'm not really sure what I did that got my phone working again...
When i reallised that I only had main and fs for my phone, and that my custompack was somehow imposiblle for me to find yesturday, I decided to try and make it work somehow else

I downloaded the custpac kor K610i, according too my region, and just put that on my phone...

As weird as it may sound, my z550 worked perfectlly, except one little bug: I couldn't download java apps from wap, not such a big problem, but it still bugd me...

So, here's what I did: I had a copy of my old customise.xml in my backup folder, and all I did was replace the file now in my phone with the old one... And VOILA! Phone is perfect!!! Even a few bonus features, like faceWrap, that i wasn't able to install in the old days, couse it sayd the apppl is not yet available for my phone, now i got it preinstalled... :p